I see the message that “The central server is not responding!”, What should I do?

Q: I see the message that “The central server is not responding!”, What should I do?

A: Such a message is possible in two cases
1) You do not currently have an Internet connection, check whether WiFi or data transfer is enabled
2) In fact, something happened to the server of the game, try to enter the game a little later, for example, after 30 minutes.